On Wed, 09 Jan 2019 13:07:38 -0500, Dennis Lee Bieber wrote:

> On Wed, 09 Jan 2019 13:05:13 +1300,
> nospam.Vince.Coen@f1.n250.z2.binkp.net (Vince Coen) declaimed the
> following:
>
>>I have decided touse a laptop ps that gives 19v at 3.43w and hopefully
>>can even use it to power the Pi as well - have to look when the kit
>>arrives from Singapore in 10 - 20 days.
>>
>  You're going to need some sort of voltage regulation to drop that
19V
> down to a level most equipment wants. The input of the R-Pi is 5V (as
> are the BeagleBone Black, Arduinos, TIVAs, etc.). Going much above those
> levels will either damage the board, or cause very hot running if they
> have on-board regulation.
>
>>The drive is one of a few spare 1 Tb among many others so I do wish to
>>make use of one or more and not use a USB external which I use for back
>>ups only.
>
>  I suspect most "full size" drives are either 12V or 5V (probably
> depending upon connector). A "Best Buy" drive enclosure I have uses
> 12V@2A wall wart barrel jack and a USB-3 connector for data (not power).
> .

Solid state converters are easy to find on eBay.

For years I drove the PNA (Personal Navigational Assistant, or pocket
satnav) in my glider off the sort you used to find that fit the cigarette
lighter in a car. When that failed after 10 years or so I picked up a
much meatier unit off eBay (12-22v in, 5v out at up to 3A) which works
just fine.

There are lots of these on eBay for under GBP 5, some already fitted with
a USB 2 socket and some advertising themselves a perfect for driving an
RPi. The ones without a USB socket all have decent, thick wire on the
output side.

Apparently they were originally sold to power the LEDs 'da kidz' liked to
decorate their cars with.


--
Martin    | martin at
Gregorie  | gregorie dot org

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